Data / Rankings / Population aged 18 to 64 / Counties in Kansas

Counties in Kansas by population aged 18 to 64

Riley County had the highest population aged 18 to 64 of 105 counties in 2018, at 73.8%. Elk County had the lowest, at 50.9%. The median was 55.6% and the figure for Kansas was 59.8%. Source: the U.S. Census Bureau.

Highest73.8Riley County
Lowest50.9Elk County
Median55.6105 counties
Kansas59.8History

Top 40 counties, 2018

Riley County: 73.8 %Riley County73.8Douglas County: 68.1 %Douglas County68.1Ellis County: 63.5 %Ellis County63.5Lyon County: 62.2 %Lyon County62.2Crawford County: 61.8 %Crawford County61.8Geary County: 61.8 %Geary County61.8Norton County: 61.6 %Norton County61.6Leavenworth County: 61.4 %Leavenworth County61.4Johnson County: 60.6 %Johnson County60.6Wyandotte County: 60.5 %Wyandotte County60.5Atchison County: 60.1 %Atchison County60.1Sedgwick County: 60.1 %Sedgwick County60.1Pawnee County: 60.1 %Pawnee County60.1Finney County: 59.5 %Finney County59.5Doniphan County: 59.3 %Doniphan County59.3Thomas County: 59.3 %Thomas County59.3Ellsworth County: 59.2 %Ellsworth County59.2Seward County: 59.1 %Seward County59.1Franklin County: 59 %Franklin County59Saline County: 58.8 %Saline County58.8Butler County: 58.8 %Butler County58.8Miami County: 58.4 %Miami County58.4Shawnee County: 58.3 %Shawnee County58.3Ford County: 58.2 %Ford County58.2Jefferson County: 57.9 %Jefferson County57.9Cowley County: 57.9 %Cowley County57.9Rice County: 57.7 %Rice County57.7Reno County: 57.7 %Reno County57.7Sherman County: 57.5 %Sherman County57.5McPherson County: 57.5 %McPherson County57.5Cherokee County: 57.4 %Cherokee County57.4Allen County: 57.4 %Allen County57.4Chase County: 57.3 %Chase County57.3Kiowa County: 57.2 %Kiowa County57.2Hamilton County: 57.1 %Hamilton County57.1Ottawa County: 57.1 %Ottawa County57.1Barton County: 56.9 %Barton County56.9Labette County: 56.7 %Labette County56.7Montgomery County: 56.6 %Montgomery County56.6Osage County: 56.4 %Osage County56.4
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2018 (%)Change on 2017
1Riley County73.80 pts
2Douglas County68.1-0.4 pts
3Ellis County63.5-0.4 pts
4Lyon County62.2-0.3 pts
5Crawford County61.8-0.4 pts
6Geary County61.8+0.1 pts
7Norton County61.6-0.3 pts
8Leavenworth County61.4-0.5 pts
9Johnson County60.6-0.2 pts
10Wyandotte County60.5-0.1 pts
11Atchison County60.1-0.1 pts
12Sedgwick County60.1-0.2 pts
13Pawnee County60.10 pts
14Finney County59.5-0 pts
15Doniphan County59.3-0.4 pts
16Thomas County59.3-0.8 pts
17Ellsworth County59.2-0.3 pts
18Seward County59.1-0.4 pts
19Franklin County59+0.1 pts
20Saline County58.8-0.3 pts
21Butler County58.8-0.1 pts
22Miami County58.4-0.1 pts
23Shawnee County58.3-0.3 pts
24Ford County58.20 pts
25Jefferson County57.9-0.5 pts
26Cowley County57.9-0.1 pts
27Rice County57.7-0.2 pts
28Reno County57.7-0.2 pts
29Sherman County57.5-0.1 pts
30McPherson County57.5-0.1 pts
31Cherokee County57.4-0.3 pts
32Allen County57.4-0.3 pts
33Chase County57.3+1.2 pts
34Kiowa County57.2-0.1 pts
35Hamilton County57.1+1.7 pts
36Ottawa County57.1-0.4 pts
37Barton County56.9-0.3 pts
38Labette County56.7-0.3 pts
39Montgomery County56.6-0.3 pts
40Osage County56.4-0.4 pts
41Kearny County56.3-0.4 pts
42Grant County56.2+0.2 pts
43Rooks County56.1-0 pts
44Pottawatomie County56.1-0.5 pts
45Harvey County56.1-0.2 pts
46Logan County56+0.3 pts
47Neosho County56-0.4 pts
48Sumner County56-0.7 pts
49Dickinson County55.9-0 pts
50Haskell County55.9-0.3 pts
51Jackson County55.7-0.1 pts
52Bourbon County55.6-0.4 pts
53Edwards County55.6-1.2 pts
54Kingman County55.6+0.5 pts
55Morton County55.5-0.5 pts
56Wabaunsee County55.5-0.8 pts
57Stevens County55.4-0.2 pts
58Cloud County55.4-0.7 pts
59Coffey County55.3-0.7 pts
60Wilson County55.3-0 pts
61Marion County55.3-0.3 pts
62Stanton County55.2+0.8 pts
63Pratt County55.2-1 pts
64Russell County55.2-0.3 pts
65Woodson County55.2-0.6 pts
66Linn County54.9-0.1 pts
67Meade County54.9-0.5 pts
68Lane County54.9+1 pts
69Brown County54.8-0.6 pts
70Trego County54.7-0.9 pts
71Gray County54.7-0.4 pts
72Marshall County54.5-0.8 pts
73Clark County54.5+0.1 pts
74Barber County54.5-0.6 pts
75Morris County54.4-0.6 pts
76Stafford County54.4-0 pts
77Wallace County54.2+0.3 pts
78Nemaha County54.1+0.1 pts
79Wichita County54-0.7 pts
80Washington County54-0.2 pts
81Clay County54-0.7 pts
82Scott County53.9-0.8 pts
83Phillips County53.8-0.3 pts
84Ness County53.7-0.5 pts
85Anderson County53.7-0.1 pts
86Osborne County53.6-0.4 pts
87Decatur County53.6-0.1 pts
88Greenwood County53.5-1.1 pts
89Greeley County53.5-1 pts
90Rush County53.4+0.1 pts
91Chautauqua County53-0.4 pts
92Hodgeman County52.9-0.5 pts
93Sheridan County52.8-0.2 pts
94Harper County52.7-0.4 pts
95Jewell County52.6-0.3 pts
96Graham County52.6-0.1 pts
97Mitchell County52.6-0.6 pts
98Republic County52.3-0.8 pts
99Lincoln County52.2+0.1 pts
100Smith County52.2-0.6 pts
101Gove County51.4-0.7 pts
102Comanche County51.3-0.3 pts
103Rawlins County51.3-0.9 pts
104Cheyenne County51-0.2 pts
105Elk County50.9-0.3 pts

Other periods

About this ranking

Residents aged 18 to 64 as a percentage of total population on 1 July. United States: Census Bureau county population estimates by age; states and the nation are sums of their counties.

Not comparable with working-age shares for ages 15 to 64 used in EU and World Bank statistics.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

U.S. Census Bureau. (2026). Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties (Counties in Kansas by population aged 18 to 64, 2018) [Data set]. Retrieved October 12, 2026, from https://www.census.gov/programs-surveys/popest/data/data-sets.html

MLA 9

Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties, Counties in Kansas by population aged 18 to 64, 2018. U.S. Census Bureau, 25 June 2026, https://www.census.gov/programs-surveys/popest/data/data-sets.html. Invokely, https://invokely.ai/rankings/population-18-64/kansas-counties?period=2018. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. Counties in Kansas by population aged 18 to 64, 2018. Dataset. Accessed October 12, 2026. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Also distributed by Invokely, https://invokely.ai/rankings/population-18-64/kansas-counties?period=2018.

Harvard

U.S. Census Bureau (2026) Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties, Counties in Kansas by population aged 18 to 64, 2018 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/population-18-64/kansas-counties?period=2018 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_kansas_by_2018,
  author = {{U.S. Census Bureau}},
  title = {{Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties: Counties in Kansas by population aged 18 to 64, 2018}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www.census.gov/programs-surveys/popest/data/data-sets.html},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/population-18-64/kansas-counties?period=2018. Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties: Counties in Kansas by population aged 18 to 64, 2018
PY  - 2026
DA  - 2026/06/25
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www.census.gov/programs-surveys/popest/data/data-sets.html
L2  - https://invokely.ai/rankings/population-18-64/kansas-counties?period=2018
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-18-64/kansas-counties?period=2018.
N1  - Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.
ER  -
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Questions

Which county has the highest population aged 18 to 64?

Riley County, with 73.8% in 2018, according to the U.S. Census Bureau.

Which county has the lowest population aged 18 to 64?

Elk County, with 50.9% in 2018.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. Retrieved 2026-10-12.

Population aged 18 to 64: other rankings

Counties in Kansas: more rankings